The Physics Society of Iran Iranian Journal of Physics Research 1682-6957 25 3 2025 12 22 Investigation of the effect of cold atmospheric pressure He plasma on the electrochemical hydrogen storage performance of Co/MWCNT nanoelectrodes Investigation of the effect of cold atmospheric pressure He plasma on the electrochemical hydrogen storage performance of Co/MWCNT nanoelectrodes 95 103 3633 10.47176/ijpr.25.3.81967 FA Maryam Malmir Department of Physics, Lorestan University, Khorramabad 68151-44316, Iran; Azadeh Barjasteh Department of Physics, Lorestan University, Khorramabad 68151-44316, Iran; 0000-0001-9758-8602 Shokufeh Varshoy University of Technology Sydney Journal Article 2024 08 28 The effect of cold atmospheric <em>He</em> plasma on multi-walled carbon nanotube (MWCNT) / cobalt nanoelectrodes has been investigated for reversible hydrogen ion storage. To perform plasma treatment, the material suspensions were subjected to plasma treatment for different durations, such as 30, 60, and 100 seconds, and then deposited on Cu foam to be used as active anode material. After characterization, the discharge capacity of the nanoelectrodes was examined, revealing that cold plasma treatment, even at the shortest duration (30 seconds), increases the hydrogen storage capacity of the nanoelectrodes due to the formation of reactive oxygen and nitrogen functional groups on the walls of the MWCNTs. This study also indicated that there is an optimal plasma treatment time of 60 seconds, resulting in the highest discharge capacity of 9700 mAh/gr at a constant current of 1 mA. Consequently, <em>He</em> plasma treatment of the nanoelectrodes offers promising applications in hydrogen storage and the battery industry. The effect of cold atmospheric <em>He</em> plasma on multi-walled carbon nanotube (MWCNT) / cobalt nanoelectrodes has been investigated for reversible hydrogen ion storage. To perform plasma treatment, the material suspensions were subjected to plasma treatment for different durations, such as 30, 60, and 100 seconds, and then deposited on Cu foam to be used as active anode material. After characterization, the discharge capacity of the nanoelectrodes was examined, revealing that cold plasma treatment, even at the shortest duration (30 seconds), increases the hydrogen storage capacity of the nanoelectrodes due to the formation of reactive oxygen and nitrogen functional groups on the walls of the MWCNTs. This study also indicated that there is an optimal plasma treatment time of 60 seconds, resulting in the highest discharge capacity of 9700 mAh/gr at a constant current of 1 mA. Consequently, <em>He</em> plasma treatment of the nanoelectrodes offers promising applications in hydrogen storage and the battery industry. https://ijpr.iut.ac.ir/article_3633_acf922154627f6788918f03c42b123cd.pdf